Why does a guest detect so many PCI bridge devices ?

Why does the guest detect
so many PCI bridge devices ?

A virtual machine configured with

virtualHW.version = "7"

has several PCI-bridges - this allows to use for example
up to
10 networkcards or 4 SCSI-controllers.
If you want to disable those PCI-bridges add this lines
to your
vmx-file - and make sure you do not define those
parameters twice

On a newly installed guest this usually is no problem.If you upgrade the virtual hardware of guest from version 4 to version 7 this can be a problem and the guest may go into an endless loop of detection new devices and reboots.In this case you can workaround the problem by disabling the unused PCI-bridges.